Question

Arrange in increasing order of acid strength: CH3CH2OH, CF3CH2OH, CCl3CH2OH.​

Answer 1

CH3CH2OH<CCl3CH2OH<CF3CH2OH

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Answer 2

Answer:

Increasing order of acid strength-

$CF_{3}CH_{2}OH > CCl_{3}CH_{2}OH > CH_{3} CH_{2}OH$

Explanation:

• If an electron donating group is present in a compound, it decreases the strength of the acid.
• If an electron-withdrawing group is present in a compound, it increases the strength of the acid.
• $-CH_{3}$ is an electron donating group, it will decrease the strength of the acid.
• $-Cl$ is an electron-withdrawing group, it increases the acidity.
• $-F$ is a stronger electron-withdrawing group, it will increase the acid strength to a great extent.
• The order of the electron-withdrawing capability is:

          $-F^{-} > -Cl^{-} > -CH_{3}$

• Therefore, the increasing order of acid strength is-

        $CF_{3}CH_{2}OH > CCl_{3}CH_{2}OH > CH_{3} CH_{2}OH$